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/*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
*
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
*
* Permission is hereby granted to use or copy this program
* for any purpose, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
#include "private/gc_pmark.h"
#include <stdio.h>
#include <limits.h>
#include <stdarg.h>
#ifndef MSWINCE
# include <signal.h>
#endif
#ifdef GC_SOLARIS_THREADS
# include <sys/syscall.h>
#endif
#if defined(MSWIN32) || defined(MSWINCE) \
|| (defined(CYGWIN32) && defined(GC_READ_ENV_FILE))
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN 1
# endif
# define NOSERVICE
# include <windows.h>
#endif
#if defined(UNIX_LIKE) || defined(CYGWIN32) || defined(SYMBIAN)
# include <fcntl.h>
# include <sys/types.h>
# include <sys/stat.h>
#endif
#ifdef NONSTOP
# include <floss.h>
#endif
#ifdef THREADS
# ifdef PCR
# include "il/PCR_IL.h"
GC_INNER PCR_Th_ML GC_allocate_ml;
# elif defined(SN_TARGET_PSP2)
GC_INNER WapiMutex GC_allocate_ml_PSP2 = { 0, NULL };
# elif defined(SN_TARGET_ORBIS) || defined(SN_TARGET_PS3)
# include <pthread.h>
GC_INNER pthread_mutex_t GC_allocate_ml;
# endif
/* For other platforms with threads, the lock and possibly */
/* GC_lock_holder variables are defined in the thread support code. */
#endif /* THREADS */
#ifdef DYNAMIC_LOADING
/* We need to register the main data segment. Returns TRUE unless */
/* this is done implicitly as part of dynamic library registration. */
# define GC_REGISTER_MAIN_STATIC_DATA() GC_register_main_static_data()
#elif defined(GC_DONT_REGISTER_MAIN_STATIC_DATA)
# define GC_REGISTER_MAIN_STATIC_DATA() FALSE
#else
/* Don't unnecessarily call GC_register_main_static_data() in case */
/* dyn_load.c isn't linked in. */
# define GC_REGISTER_MAIN_STATIC_DATA() TRUE
#endif
#ifdef NEED_CANCEL_DISABLE_COUNT
__thread unsigned char GC_cancel_disable_count = 0;
#endif
GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
GC_INNER GC_bool GC_debugging_started = FALSE;
/* defined here so we don't have to load dbg_mlc.o */
ptr_t GC_stackbottom = 0;
#ifdef IA64
ptr_t GC_register_stackbottom = 0;
#endif
int GC_dont_gc = FALSE;
int GC_dont_precollect = FALSE;
GC_bool GC_quiet = 0; /* used also in pcr_interface.c */
#if !defined(NO_CLOCK) || !defined(SMALL_CONFIG)
int GC_print_stats = 0;
#endif
#ifdef GC_PRINT_BACK_HEIGHT
GC_INNER GC_bool GC_print_back_height = TRUE;
#else
GC_INNER GC_bool GC_print_back_height = FALSE;
#endif
#ifndef NO_DEBUGGING
# ifdef GC_DUMP_REGULARLY
GC_INNER GC_bool GC_dump_regularly = TRUE;
/* Generate regular debugging dumps. */
# else
GC_INNER GC_bool GC_dump_regularly = FALSE;
# endif
# ifndef NO_CLOCK
STATIC CLOCK_TYPE GC_init_time;
/* The time that the GC was initialized at. */
# endif
#endif /* !NO_DEBUGGING */
#ifdef KEEP_BACK_PTRS
GC_INNER long GC_backtraces = 0;
/* Number of random backtraces to generate for each GC. */
#endif
#ifdef FIND_LEAK
int GC_find_leak = 1;
#else
int GC_find_leak = 0;
#endif
#ifndef SHORT_DBG_HDRS
# ifdef GC_FINDLEAK_DELAY_FREE
GC_INNER GC_bool GC_findleak_delay_free = TRUE;
# else
GC_INNER GC_bool GC_findleak_delay_free = FALSE;
# endif
#endif /* !SHORT_DBG_HDRS */
#ifdef ALL_INTERIOR_POINTERS
int GC_all_interior_pointers = 1;
#else
int GC_all_interior_pointers = 0;
#endif
#ifdef FINALIZE_ON_DEMAND
int GC_finalize_on_demand = 1;
#else
int GC_finalize_on_demand = 0;
#endif
#ifdef JAVA_FINALIZATION
int GC_java_finalization = 1;
#else
int GC_java_finalization = 0;
#endif
/* All accesses to it should be synchronized to avoid data races. */
GC_finalizer_notifier_proc GC_finalizer_notifier =
(GC_finalizer_notifier_proc)0;
#ifdef GC_FORCE_UNMAP_ON_GCOLLECT
/* Has no effect unless USE_MUNMAP. */
/* Has no effect on implicitly-initiated garbage collections. */
GC_INNER GC_bool GC_force_unmap_on_gcollect = TRUE;
#else
GC_INNER GC_bool GC_force_unmap_on_gcollect = FALSE;
#endif
#ifndef GC_LARGE_ALLOC_WARN_INTERVAL
# define GC_LARGE_ALLOC_WARN_INTERVAL 5
#endif
GC_INNER long GC_large_alloc_warn_interval = GC_LARGE_ALLOC_WARN_INTERVAL;
/* Interval between unsuppressed warnings. */
STATIC void * GC_CALLBACK GC_default_oom_fn(
size_t bytes_requested GC_ATTR_UNUSED)
{
return(0);
}
/* All accesses to it should be synchronized to avoid data races. */
GC_oom_func GC_oom_fn = GC_default_oom_fn;
#ifdef CAN_HANDLE_FORK
# ifdef HANDLE_FORK
GC_INNER int GC_handle_fork = 1;
/* The value is examined by GC_thr_init. */
# else
GC_INNER int GC_handle_fork = FALSE;
# endif
#elif !defined(HAVE_NO_FORK)
/* Same as above but with GC_CALL calling conventions. */
GC_API void GC_CALL GC_atfork_prepare(void)
{
# ifdef THREADS
ABORT("fork() handling unsupported");
# endif
}
GC_API void GC_CALL GC_atfork_parent(void)
{
/* empty */
}
GC_API void GC_CALL GC_atfork_child(void)
{
/* empty */
}
#endif /* !CAN_HANDLE_FORK && !HAVE_NO_FORK */
/* Overrides the default automatic handle-fork mode. Has effect only */
/* if called before GC_INIT. */
GC_API void GC_CALL GC_set_handle_fork(int value GC_ATTR_UNUSED)
{
# ifdef CAN_HANDLE_FORK
if (!GC_is_initialized)
GC_handle_fork = value >= -1 ? value : 1;
/* Map all negative values except for -1 to a positive one. */
# elif defined(THREADS) || (defined(DARWIN) && defined(MPROTECT_VDB))
if (!GC_is_initialized && value) {
# ifndef SMALL_CONFIG
GC_init(); /* to initialize GC_manual_vdb and GC_stderr */
# ifndef THREADS
if (GC_manual_vdb)
return;
# endif
# endif
ABORT("fork() handling unsupported");
}
# else
/* No at-fork handler is needed in the single-threaded mode. */
# endif
}
/* Set things up so that GC_size_map[i] >= granules(i), */
/* but not too much bigger */
/* and so that size_map contains relatively few distinct entries */
/* This was originally stolen from Russ Atkinson's Cedar */
/* quantization algorithm (but we precompute it). */
STATIC void GC_init_size_map(void)
{
size_t i;
/* Map size 0 to something bigger. */
/* This avoids problems at lower levels. */
GC_size_map[0] = 1;
for (i = 1; i <= GRANULES_TO_BYTES(TINY_FREELISTS-1) - EXTRA_BYTES; i++) {
GC_size_map[i] = ROUNDED_UP_GRANULES(i);
# ifndef _MSC_VER
GC_ASSERT(GC_size_map[i] < TINY_FREELISTS);
/* Seems to tickle bug in VC++ 2008 for AMD64 */
# endif
}
/* We leave the rest of the array to be filled in on demand. */
}
/*
* The following is a gross hack to deal with a problem that can occur
* on machines that are sloppy about stack frame sizes, notably SPARC.
* Bogus pointers may be written to the stack and not cleared for
* a LONG time, because they always fall into holes in stack frames
* that are not written. We partially address this by clearing
* sections of the stack whenever we get control.
*/
#ifndef SMALL_CLEAR_SIZE
# define SMALL_CLEAR_SIZE 256 /* Clear this much every time. */
#endif
#if defined(ALWAYS_SMALL_CLEAR_STACK) || defined(STACK_NOT_SCANNED)
GC_API void * GC_CALL GC_clear_stack(void *arg)
{
# ifndef STACK_NOT_SCANNED
word volatile dummy[SMALL_CLEAR_SIZE];
BZERO((/* no volatile */ void *)dummy, sizeof(dummy));
# endif
return arg;
}
#else
# ifdef THREADS
# define BIG_CLEAR_SIZE 2048 /* Clear this much now and then. */
# else
STATIC word GC_stack_last_cleared = 0; /* GC_no when we last did this */
STATIC ptr_t GC_min_sp = NULL;
/* Coolest stack pointer value from which */
/* we've already cleared the stack. */
STATIC ptr_t GC_high_water = NULL;
/* "hottest" stack pointer value we have seen */
/* recently. Degrades over time. */
STATIC word GC_bytes_allocd_at_reset = 0;
# define DEGRADE_RATE 50
# endif
# if defined(ASM_CLEAR_CODE)
void *GC_clear_stack_inner(void *, ptr_t);
# else
/* Clear the stack up to about limit. Return arg. This function */
/* is not static because it could also be erroneously defined in .S */
/* file, so this error would be caught by the linker. */
void *GC_clear_stack_inner(void *arg,
# if defined(__APPLE_CC__) && !GC_CLANG_PREREQ(6, 0)
volatile /* to workaround some bug */
# endif
ptr_t limit)
{
# define CLEAR_SIZE 213 /* granularity */
volatile word dummy[CLEAR_SIZE];
BZERO((/* no volatile */ void *)dummy, sizeof(dummy));
if ((word)GC_approx_sp() COOLER_THAN (word)limit) {
(void)GC_clear_stack_inner(arg, limit);
}
/* Make sure the recursive call is not a tail call, and the bzero */
/* call is not recognized as dead code. */
GC_noop1((word)dummy);
return(arg);
}
# endif /* !ASM_CLEAR_CODE */
# ifdef THREADS
/* Used to occasionally clear a bigger chunk. */
/* TODO: Should be more random than it is ... */
GC_ATTR_NO_SANITIZE_THREAD
static unsigned next_random_no(void)
{
static unsigned random_no = 0;
return ++random_no % 13;
}
# endif /* THREADS */
/* Clear some of the inaccessible part of the stack. Returns its */
/* argument, so it can be used in a tail call position, hence clearing */
/* another frame. */
GC_API void * GC_CALL GC_clear_stack(void *arg)
{
ptr_t sp = GC_approx_sp(); /* Hotter than actual sp */
# ifdef THREADS
word volatile dummy[SMALL_CLEAR_SIZE];
# endif
# define SLOP 400
/* Extra bytes we clear every time. This clears our own */
/* activation record, and should cause more frequent */
/* clearing near the cold end of the stack, a good thing. */
# define GC_SLOP 4000
/* We make GC_high_water this much hotter than we really saw */
/* it, to cover for GC noise etc. above our current frame. */
# define CLEAR_THRESHOLD 100000
/* We restart the clearing process after this many bytes of */
/* allocation. Otherwise very heavily recursive programs */
/* with sparse stacks may result in heaps that grow almost */
/* without bounds. As the heap gets larger, collection */
/* frequency decreases, thus clearing frequency would decrease, */
/* thus more junk remains accessible, thus the heap gets */
/* larger ... */
# ifdef THREADS
if (next_random_no() == 0) {
ptr_t limit = sp;
MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(word));
limit = (ptr_t)((word)limit & ~0xf);
/* Make it sufficiently aligned for assembly */
/* implementations of GC_clear_stack_inner. */
return GC_clear_stack_inner(arg, limit);
}
BZERO((void *)dummy, SMALL_CLEAR_SIZE*sizeof(word));
# else
if (GC_gc_no > GC_stack_last_cleared) {
/* Start things over, so we clear the entire stack again */
if (GC_stack_last_cleared == 0)
GC_high_water = (ptr_t)GC_stackbottom;
GC_min_sp = GC_high_water;
GC_stack_last_cleared = GC_gc_no;
GC_bytes_allocd_at_reset = GC_bytes_allocd;
}
/* Adjust GC_high_water */
MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
if ((word)sp HOTTER_THAN (word)GC_high_water) {
GC_high_water = sp;
}
MAKE_HOTTER(GC_high_water, GC_SLOP);
{
ptr_t limit = GC_min_sp;
MAKE_HOTTER(limit, SLOP);
if ((word)sp COOLER_THAN (word)limit) {
limit = (ptr_t)((word)limit & ~0xf);
/* Make it sufficiently aligned for assembly */
/* implementations of GC_clear_stack_inner. */
GC_min_sp = sp;
return GC_clear_stack_inner(arg, limit);
}
}
if (GC_bytes_allocd - GC_bytes_allocd_at_reset > CLEAR_THRESHOLD) {
/* Restart clearing process, but limit how much clearing we do. */
GC_min_sp = sp;
MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
if ((word)GC_min_sp HOTTER_THAN (word)GC_high_water)
GC_min_sp = GC_high_water;
GC_bytes_allocd_at_reset = GC_bytes_allocd;
}
# endif
return arg;
}
#endif /* !ALWAYS_SMALL_CLEAR_STACK && !STACK_NOT_SCANNED */
/* Return a pointer to the base address of p, given a pointer to a */
/* an address within an object. Return 0 o.w. */
GC_API void * GC_CALL GC_base(void * p)
{
ptr_t r;
struct hblk *h;
bottom_index *bi;
hdr *candidate_hdr;
r = (ptr_t)p;
if (!EXPECT(GC_is_initialized, TRUE)) return 0;
h = HBLKPTR(r);
GET_BI(r, bi);
candidate_hdr = HDR_FROM_BI(bi, r);
if (candidate_hdr == 0) return(0);
/* If it's a pointer to the middle of a large object, move it */
/* to the beginning. */
while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
h = FORWARDED_ADDR(h,candidate_hdr);
r = (ptr_t)h;
candidate_hdr = HDR(h);
}
if (HBLK_IS_FREE(candidate_hdr)) return(0);
/* Make sure r points to the beginning of the object */
r = (ptr_t)((word)r & ~(WORDS_TO_BYTES(1) - 1));
{
size_t offset = HBLKDISPL(r);
word sz = candidate_hdr -> hb_sz;
size_t obj_displ = offset % sz;
ptr_t limit;
r -= obj_displ;
limit = r + sz;
if ((word)limit > (word)(h + 1) && sz <= HBLKSIZE) {
return(0);
}
if ((word)p >= (word)limit) return(0);
}
return((void *)r);
}
/* Return TRUE if and only if p points to somewhere in GC heap. */
GC_API int GC_CALL GC_is_heap_ptr(const void *p)
{
bottom_index *bi;
GC_ASSERT(GC_is_initialized);
GET_BI(p, bi);
return HDR_FROM_BI(bi, p) != 0;
}
/* Return the size of an object, given a pointer to its base. */
/* (For small objects this also happens to work from interior pointers, */
/* but that shouldn't be relied upon.) */
GC_API size_t GC_CALL GC_size(const void * p)
{
hdr * hhdr = HDR(p);
return (size_t)hhdr->hb_sz;
}
/* These getters remain unsynchronized for compatibility (since some */
/* clients could call some of them from a GC callback holding the */
/* allocator lock). */
GC_API size_t GC_CALL GC_get_heap_size(void)
{
/* ignore the memory space returned to OS (i.e. count only the */
/* space owned by the garbage collector) */
return (size_t)(GC_heapsize - GC_unmapped_bytes);
}
GC_API size_t GC_CALL GC_get_free_bytes(void)
{
/* ignore the memory space returned to OS */
return (size_t)(GC_large_free_bytes - GC_unmapped_bytes);
}
GC_API size_t GC_CALL GC_get_unmapped_bytes(void)
{
return (size_t)GC_unmapped_bytes;
}
GC_API size_t GC_CALL GC_get_bytes_since_gc(void)
{
return (size_t)GC_bytes_allocd;
}
GC_API size_t GC_CALL GC_get_total_bytes(void)
{
return (size_t)(GC_bytes_allocd + GC_bytes_allocd_before_gc);
}
#ifndef GC_GET_HEAP_USAGE_NOT_NEEDED
GC_API size_t GC_CALL GC_get_size_map_at(int i)
{
if ((unsigned)i > MAXOBJBYTES)
return GC_SIZE_MAX;
return GRANULES_TO_BYTES(GC_size_map[i]);
}
/* Return the heap usage information. This is a thread-safe (atomic) */
/* alternative for the five above getters. NULL pointer is allowed for */
/* any argument. Returned (filled in) values are of word type. */
GC_API void GC_CALL GC_get_heap_usage_safe(GC_word *pheap_size,
GC_word *pfree_bytes, GC_word *punmapped_bytes,
GC_word *pbytes_since_gc, GC_word *ptotal_bytes)
{
DCL_LOCK_STATE;
LOCK();
if (pheap_size != NULL)
*pheap_size = GC_heapsize - GC_unmapped_bytes;
if (pfree_bytes != NULL)
*pfree_bytes = GC_large_free_bytes - GC_unmapped_bytes;
if (punmapped_bytes != NULL)
*punmapped_bytes = GC_unmapped_bytes;
if (pbytes_since_gc != NULL)
*pbytes_since_gc = GC_bytes_allocd;
if (ptotal_bytes != NULL)
*ptotal_bytes = GC_bytes_allocd + GC_bytes_allocd_before_gc;
UNLOCK();
}
GC_INNER word GC_reclaimed_bytes_before_gc = 0;
/* Fill in GC statistics provided the destination is of enough size. */
static void fill_prof_stats(struct GC_prof_stats_s *pstats)
{
pstats->heapsize_full = GC_heapsize;
pstats->free_bytes_full = GC_large_free_bytes;
pstats->unmapped_bytes = GC_unmapped_bytes;
pstats->bytes_allocd_since_gc = GC_bytes_allocd;
pstats->allocd_bytes_before_gc = GC_bytes_allocd_before_gc;
pstats->non_gc_bytes = GC_non_gc_bytes;
pstats->gc_no = GC_gc_no; /* could be -1 */
# ifdef PARALLEL_MARK
pstats->markers_m1 = (word)GC_markers_m1;
# else
pstats->markers_m1 = 0; /* one marker */
# endif
pstats->bytes_reclaimed_since_gc = GC_bytes_found > 0 ?
(word)GC_bytes_found : 0;
pstats->reclaimed_bytes_before_gc = GC_reclaimed_bytes_before_gc;
pstats->expl_freed_bytes_since_gc = GC_bytes_freed; /* since gc-7.7 */
}
# include <string.h> /* for memset() */
GC_API size_t GC_CALL GC_get_prof_stats(struct GC_prof_stats_s *pstats,
size_t stats_sz)
{
struct GC_prof_stats_s stats;
DCL_LOCK_STATE;
LOCK();
fill_prof_stats(stats_sz >= sizeof(stats) ? pstats : &stats);
UNLOCK();
if (stats_sz == sizeof(stats)) {
return sizeof(stats);
} else if (stats_sz > sizeof(stats)) {
/* Fill in the remaining part with -1. */
memset((char *)pstats + sizeof(stats), 0xff, stats_sz - sizeof(stats));
return sizeof(stats);
} else {
if (EXPECT(stats_sz > 0, TRUE))
BCOPY(&stats, pstats, stats_sz);
return stats_sz;
}
}
# ifdef THREADS
/* The _unsafe version assumes the caller holds the allocation lock. */
GC_API size_t GC_CALL GC_get_prof_stats_unsafe(
struct GC_prof_stats_s *pstats,
size_t stats_sz)
{
struct GC_prof_stats_s stats;
if (stats_sz >= sizeof(stats)) {
fill_prof_stats(pstats);
if (stats_sz > sizeof(stats))
memset((char *)pstats + sizeof(stats), 0xff,
stats_sz - sizeof(stats));
return sizeof(stats);
} else {
if (EXPECT(stats_sz > 0, TRUE)) {
fill_prof_stats(&stats);
BCOPY(&stats, pstats, stats_sz);
}
return stats_sz;
}
}
# endif /* THREADS */
#endif /* !GC_GET_HEAP_USAGE_NOT_NEEDED */
#if defined(GC_DARWIN_THREADS) || defined(GC_OPENBSD_UTHREADS) \
|| defined(GC_WIN32_THREADS) || (defined(NACL) && defined(THREADS))
/* GC does not use signals to suspend and restart threads. */
GC_API void GC_CALL GC_set_suspend_signal(int sig GC_ATTR_UNUSED)
{
/* empty */
}
GC_API void GC_CALL GC_set_thr_restart_signal(int sig GC_ATTR_UNUSED)
{
/* empty */
}
GC_API int GC_CALL GC_get_suspend_signal(void)
{
return -1;
}
GC_API int GC_CALL GC_get_thr_restart_signal(void)
{
return -1;
}
#endif /* GC_DARWIN_THREADS || GC_WIN32_THREADS || ... */
#if !defined(_MAX_PATH) && (defined(MSWIN32) || defined(MSWINCE) \
|| defined(CYGWIN32))
# define _MAX_PATH MAX_PATH
#endif
#ifdef GC_READ_ENV_FILE
/* This works for Win32/WinCE for now. Really useful only for WinCE. */
STATIC char *GC_envfile_content = NULL;
/* The content of the GC "env" file with CR and */
/* LF replaced to '\0'. NULL if the file is */
/* missing or empty. Otherwise, always ends */
/* with '\0'. */
STATIC unsigned GC_envfile_length = 0;
/* Length of GC_envfile_content (if non-NULL). */
# ifndef GC_ENVFILE_MAXLEN
# define GC_ENVFILE_MAXLEN 0x4000
# endif
# define GC_ENV_FILE_EXT ".gc.env"
/* The routine initializes GC_envfile_content from the GC "env" file. */
STATIC void GC_envfile_init(void)
{
# if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
HANDLE hFile;
char *content;
unsigned ofs;
unsigned len;
DWORD nBytesRead;
TCHAR path[_MAX_PATH + 0x10]; /* buffer for path + ext */
len = (unsigned)GetModuleFileName(NULL /* hModule */, path,
_MAX_PATH + 1);
/* If GetModuleFileName() has failed then len is 0. */
if (len > 4 && path[len - 4] == (TCHAR)'.') {
len -= 4; /* strip executable file extension */
}
BCOPY(TEXT(GC_ENV_FILE_EXT), &path[len], sizeof(TEXT(GC_ENV_FILE_EXT)));
hFile = CreateFile(path, GENERIC_READ,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL /* lpSecurityAttributes */, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, NULL /* hTemplateFile */);
if (hFile == INVALID_HANDLE_VALUE)
return; /* the file is absent or the operation is failed */
len = (unsigned)GetFileSize(hFile, NULL);
if (len <= 1 || len >= GC_ENVFILE_MAXLEN) {
CloseHandle(hFile);
return; /* invalid file length - ignoring the file content */
}
/* At this execution point, GC_setpagesize() and GC_init_win32() */
/* must already be called (for GET_MEM() to work correctly). */
content = (char *)GET_MEM(ROUNDUP_PAGESIZE_IF_MMAP((size_t)len + 1));
if (content == NULL) {
CloseHandle(hFile);
return; /* allocation failure */
}
ofs = 0;
nBytesRead = (DWORD)-1L;
/* Last ReadFile() call should clear nBytesRead on success. */
while (ReadFile(hFile, content + ofs, len - ofs + 1, &nBytesRead,
NULL /* lpOverlapped */) && nBytesRead != 0) {
if ((ofs += nBytesRead) > len)
break;
}
CloseHandle(hFile);
if (ofs != len || nBytesRead != 0)
return; /* read operation is failed - ignoring the file content */
content[ofs] = '\0';
while (ofs-- > 0) {
if (content[ofs] == '\r' || content[ofs] == '\n')
content[ofs] = '\0';
}
GC_ASSERT(NULL == GC_envfile_content);
GC_envfile_length = len + 1;
GC_envfile_content = content;
# endif
}
/* This routine scans GC_envfile_content for the specified */
/* environment variable (and returns its value if found). */
GC_INNER char * GC_envfile_getenv(const char *name)
{
char *p;
char *end_of_content;
unsigned namelen;
# ifndef NO_GETENV
p = getenv(name); /* try the standard getenv() first */
if (p != NULL)
return *p != '\0' ? p : NULL;
# endif
p = GC_envfile_content;
if (p == NULL)
return NULL; /* "env" file is absent (or empty) */
namelen = strlen(name);
if (namelen == 0) /* a sanity check */
return NULL;
for (end_of_content = p + GC_envfile_length;
p != end_of_content; p += strlen(p) + 1) {
if (strncmp(p, name, namelen) == 0 && *(p += namelen) == '=') {
p++; /* the match is found; skip '=' */
return *p != '\0' ? p : NULL;
}
/* If not matching then skip to the next line. */
}
return NULL; /* no match found */
}
#endif /* GC_READ_ENV_FILE */
GC_INNER GC_bool GC_is_initialized = FALSE;
GC_API int GC_CALL GC_is_init_called(void)
{
return GC_is_initialized;
}
#if (defined(MSWIN32) || defined(MSWINCE) || defined(MSWIN_XBOX1)) \
&& defined(THREADS)
GC_INNER CRITICAL_SECTION GC_write_cs;
#endif
#ifndef DONT_USE_ATEXIT
# if !defined(PCR) && !defined(SMALL_CONFIG)
/* A dedicated variable to avoid a garbage collection on abort. */
/* GC_find_leak cannot be used for this purpose as otherwise */
/* TSan finds a data race (between GC_default_on_abort and, e.g., */
/* GC_finish_collection). */
static GC_bool skip_gc_atexit = FALSE;
# else
# define skip_gc_atexit FALSE
# endif
STATIC void GC_exit_check(void)
{
if (GC_find_leak && !skip_gc_atexit) {
# if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS)
GC_in_thread_creation = TRUE; /* OK to collect from unknown thread. */
GC_gcollect();
GC_in_thread_creation = FALSE;
# else
GC_gcollect();
# endif
}
}
#endif
#if defined(UNIX_LIKE) && !defined(NO_DEBUGGING)
static void looping_handler(int sig)
{
GC_err_printf("Caught signal %d: looping in handler\n", sig);
for (;;) {
/* empty */
}
}
static GC_bool installed_looping_handler = FALSE;
static void maybe_install_looping_handler(void)
{
/* Install looping handler before the write fault handler, so we */
/* handle write faults correctly. */
if (!installed_looping_handler && 0 != GETENV("GC_LOOP_ON_ABORT")) {
GC_set_and_save_fault_handler(looping_handler);
installed_looping_handler = TRUE;
}
}
#else /* !UNIX_LIKE */
# define maybe_install_looping_handler()
#endif
#define GC_DEFAULT_STDOUT_FD 1
#define GC_DEFAULT_STDERR_FD 2
#if !defined(OS2) && !defined(MACOS) && !defined(GC_ANDROID_LOG) \
&& !defined(NN_PLATFORM_CTR) && !defined(NINTENDO_SWITCH) \
&& !defined(MSWIN32) && !defined(MSWINCE)
STATIC int GC_stdout = GC_DEFAULT_STDOUT_FD;
STATIC int GC_stderr = GC_DEFAULT_STDERR_FD;
STATIC int GC_log = GC_DEFAULT_STDERR_FD;
GC_API void GC_CALL GC_set_log_fd(int fd)
{
GC_log = fd;
}
#endif
#if defined(MSWIN32) && !defined(MSWINRT_FLAVOR) && !defined(MSWIN_XBOX1) \
&& (!defined(SMALL_CONFIG) \
|| (!defined(_WIN64) && defined(GC_WIN32_THREADS) \
&& defined(CHECK_NOT_WOW64)))
STATIC void GC_win32_MessageBoxA(const char *msg, const char *caption,
unsigned flags)
{
# ifndef DONT_USE_USER32_DLL
/* Use static binding to "user32.dll". */
(void)MessageBoxA(NULL, msg, caption, flags);
# else
/* This simplifies linking - resolve "MessageBoxA" at run-time. */
HINSTANCE hU32 = LoadLibrary(TEXT("user32.dll"));
if (hU32) {
FARPROC pfn = GetProcAddress(hU32, "MessageBoxA");
if (pfn)
(void)(*(int (WINAPI *)(HWND, LPCSTR, LPCSTR, UINT))pfn)(
NULL /* hWnd */, msg, caption, flags);
(void)FreeLibrary(hU32);
}
# endif
}
#endif /* MSWIN32 */
#if defined(THREADS) && defined(UNIX_LIKE) && !defined(NO_GETCONTEXT)
static void callee_saves_pushed_dummy_fn(ptr_t data GC_ATTR_UNUSED,
void * context GC_ATTR_UNUSED) {}
#endif
#ifndef SMALL_CONFIG
# ifdef MANUAL_VDB
static GC_bool manual_vdb_allowed = TRUE;
# else
static GC_bool manual_vdb_allowed = FALSE;
# endif
GC_API void GC_CALL GC_set_manual_vdb_allowed(int value)
{
manual_vdb_allowed = (GC_bool)value;
}
GC_API int GC_CALL GC_get_manual_vdb_allowed(void)
{
return (int)manual_vdb_allowed;
}
#endif /* !SMALL_CONFIG */
STATIC word GC_parse_mem_size_arg(const char *str)
{
word result = 0; /* bad value */
if (*str != '\0') {
char *endptr;
char ch;
result = (word)STRTOULL(str, &endptr, 10);
ch = *endptr;
if (ch != '\0') {
if (*(endptr + 1) != '\0')
return 0;
/* Allow k, M or G suffix. */
switch (ch) {
case 'K':
case 'k':
result <<= 10;
break;
case 'M':
case 'm':
result <<= 20;
break;
case 'G':
case 'g':
result <<= 30;
break;
default:
result = 0;
}
}
}
return result;
}
#define GC_LOG_STD_NAME "gc.log"
GC_API void GC_CALL GC_init(void)
{
/* LOCK(); -- no longer does anything this early. */
word initial_heap_sz;
IF_CANCEL(int cancel_state;)
# if defined(GC_ASSERTIONS) && defined(GC_ALWAYS_MULTITHREADED)
DCL_LOCK_STATE;
# endif
if (EXPECT(GC_is_initialized, TRUE)) return;
# ifdef REDIRECT_MALLOC
{
static GC_bool init_started = FALSE;
if (init_started)
ABORT("Redirected malloc() called during GC init");
init_started = TRUE;
}
# endif
# if defined(GC_INITIAL_HEAP_SIZE) && !defined(CPPCHECK)
initial_heap_sz = GC_INITIAL_HEAP_SIZE;
# else
initial_heap_sz = MINHINCR * HBLKSIZE;
# endif
# if defined(MSWIN32) && !defined(_WIN64) && defined(GC_WIN32_THREADS) \
&& defined(CHECK_NOT_WOW64)
{
/* Windows: running 32-bit GC on 64-bit system is broken! */
/* WoW64 bug affects SuspendThread, no workaround exists. */
HMODULE hK32 = GetModuleHandle(TEXT("kernel32.dll"));
if (hK32) {
FARPROC pfn = GetProcAddress(hK32, "IsWow64Process");
BOOL bIsWow64 = FALSE;
if (pfn
&& (*(BOOL (WINAPI*)(HANDLE, BOOL*))pfn)(GetCurrentProcess(),
&bIsWow64)
&& bIsWow64) {
GC_win32_MessageBoxA("This program uses BDWGC garbage collector"
" compiled for 32-bit but running on 64-bit Windows.\n"
"This is known to be broken due to a design flaw"
" in Windows itself! Expect erratic behavior...",
"32-bit program running on 64-bit system",
MB_ICONWARNING | MB_OK);
}
}
}
# endif
DISABLE_CANCEL(cancel_state);
/* Note that although we are nominally called with the */
/* allocation lock held, the allocation lock is now */
/* only really acquired once a second thread is forked.*/
/* And the initialization code needs to run before */
/* then. Thus we really don't hold any locks, and can */
/* in fact safely initialize them here. */
# ifdef THREADS
# ifndef GC_ALWAYS_MULTITHREADED
GC_ASSERT(!GC_need_to_lock);
# endif
# ifdef SN_TARGET_PS3
{
pthread_mutexattr_t mattr;
if (0 != pthread_mutexattr_init(&mattr)) {
ABORT("pthread_mutexattr_init failed");
}
if (0 != pthread_mutex_init(&GC_allocate_ml, &mattr)) {
ABORT("pthread_mutex_init failed");
}
(void)pthread_mutexattr_destroy(&mattr);
}
# endif
# endif /* THREADS */
# if defined(GC_WIN32_THREADS) && !defined(GC_PTHREADS)
# ifndef SPIN_COUNT
# define SPIN_COUNT 4000
# endif
# ifdef MSWINRT_FLAVOR
InitializeCriticalSectionAndSpinCount(&GC_allocate_ml, SPIN_COUNT);
# else
{
# ifndef MSWINCE
BOOL (WINAPI *pfn)(LPCRITICAL_SECTION, DWORD) = 0;
HMODULE hK32 = GetModuleHandle(TEXT("kernel32.dll"));
if (hK32)
pfn = (BOOL (WINAPI *)(LPCRITICAL_SECTION, DWORD))
GetProcAddress(hK32,
"InitializeCriticalSectionAndSpinCount");
if (pfn) {
pfn(&GC_allocate_ml, SPIN_COUNT);
} else
# endif /* !MSWINCE */
/* else */ InitializeCriticalSection(&GC_allocate_ml);
}
# endif
# endif /* GC_WIN32_THREADS */
# if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
InitializeCriticalSection(&GC_write_cs);
# endif
GC_setpagesize();
# ifdef MSWIN32
GC_init_win32();
# endif
# ifdef GC_READ_ENV_FILE
GC_envfile_init();
# endif
# if !defined(NO_CLOCK) || !defined(SMALL_CONFIG)
# ifdef GC_PRINT_VERBOSE_STATS
/* This is useful for debugging and profiling on platforms with */
/* missing getenv() (like WinCE). */
GC_print_stats = VERBOSE;
# else
if (0 != GETENV("GC_PRINT_VERBOSE_STATS")) {
GC_print_stats = VERBOSE;
} else if (0 != GETENV("GC_PRINT_STATS")) {
GC_print_stats = 1;
}
# endif
# endif
# if ((defined(UNIX_LIKE) && !defined(GC_ANDROID_LOG)) \
|| defined(CYGWIN32) || defined(SYMBIAN)) && !defined(SMALL_CONFIG)
{
char * file_name = TRUSTED_STRING(GETENV("GC_LOG_FILE"));
# ifdef GC_LOG_TO_FILE_ALWAYS
if (NULL == file_name)
file_name = GC_LOG_STD_NAME;
# else
if (0 != file_name)
# endif
{
int log_d = open(file_name, O_CREAT|O_WRONLY|O_APPEND, 0666);
if (log_d < 0) {
GC_err_printf("Failed to open %s as log file\n", file_name);
} else {
char *str;
GC_log = log_d;
str = GETENV("GC_ONLY_LOG_TO_FILE");
# ifdef GC_ONLY_LOG_TO_FILE
/* The similar environment variable set to "0" */
/* overrides the effect of the macro defined. */
if (str != NULL && *str == '0' && *(str + 1) == '\0')
# else
/* Otherwise setting the environment variable */
/* to anything other than "0" will prevent from */
/* redirecting stdout/err to the log file. */
if (str == NULL || (*str == '0' && *(str + 1) == '\0'))
# endif
{
GC_stdout = log_d;
GC_stderr = log_d;
}
}
}
}
# endif
# if !defined(NO_DEBUGGING) && !defined(GC_DUMP_REGULARLY)
if (0 != GETENV("GC_DUMP_REGULARLY")) {
GC_dump_regularly = TRUE;
}
# endif
# ifdef KEEP_BACK_PTRS
{
char * backtraces_string = GETENV("GC_BACKTRACES");
if (0 != backtraces_string) {
GC_backtraces = atol(backtraces_string);
if (backtraces_string[0] == '\0') GC_backtraces = 1;
}
}
# endif
if (0 != GETENV("GC_FIND_LEAK")) {
GC_find_leak = 1;
}
# ifndef SHORT_DBG_HDRS
if (0 != GETENV("GC_FINDLEAK_DELAY_FREE")) {
GC_findleak_delay_free = TRUE;
}
# endif
if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
GC_all_interior_pointers = 1;
}
if (0 != GETENV("GC_DONT_GC")) {
GC_dont_gc = 1;
}
if (0 != GETENV("GC_PRINT_BACK_HEIGHT")) {
GC_print_back_height = TRUE;
}
if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
GC_large_alloc_warn_interval = LONG_MAX;
}
{
char * addr_string = GETENV("GC_TRACE");
if (0 != addr_string) {
# ifndef ENABLE_TRACE
WARN("Tracing not enabled: Ignoring GC_TRACE value\n", 0);
# else
word addr = (word)STRTOULL(addr_string, NULL, 16);
if (addr < 0x1000)
WARN("Unlikely trace address: %p\n", (void *)addr);
GC_trace_addr = (ptr_t)addr;
# endif
}
}
# ifdef GC_COLLECT_AT_MALLOC
{
char * string = GETENV("GC_COLLECT_AT_MALLOC");
if (0 != string) {
size_t min_lb = (size_t)STRTOULL(string, NULL, 10);
if (min_lb > 0)
GC_dbg_collect_at_malloc_min_lb = min_lb;
}
}
# endif
# ifndef GC_DISABLE_INCREMENTAL
{
char * time_limit_string = GETENV("GC_PAUSE_TIME_TARGET");
if (0 != time_limit_string) {
long time_limit = atol(time_limit_string);
if (time_limit < 5) {
WARN("GC_PAUSE_TIME_TARGET environment variable value too small "
"or bad syntax: Ignoring\n", 0);
} else {
GC_time_limit = time_limit;
}
}
}
# endif
# ifndef SMALL_CONFIG
{
char * full_freq_string = GETENV("GC_FULL_FREQUENCY");
if (full_freq_string != NULL) {
int full_freq = atoi(full_freq_string);
if (full_freq > 0)
GC_full_freq = full_freq;
}
}
# endif
{
char * interval_string = GETENV("GC_LARGE_ALLOC_WARN_INTERVAL");
if (0 != interval_string) {
long interval = atol(interval_string);
if (interval <= 0) {
WARN("GC_LARGE_ALLOC_WARN_INTERVAL environment variable has "
"bad value: Ignoring\n", 0);
} else {
GC_large_alloc_warn_interval = interval;
}
}
}
{
char * space_divisor_string = GETENV("GC_FREE_SPACE_DIVISOR");
if (space_divisor_string != NULL) {
int space_divisor = atoi(space_divisor_string);
if (space_divisor > 0)
GC_free_space_divisor = (word)space_divisor;
}
}
# ifdef USE_MUNMAP
{
char * string = GETENV("GC_UNMAP_THRESHOLD");
if (string != NULL) {
if (*string == '0' && *(string + 1) == '\0') {
/* "0" is used to disable unmapping. */
GC_unmap_threshold = 0;
} else {
int unmap_threshold = atoi(string);
if (unmap_threshold > 0)
GC_unmap_threshold = unmap_threshold;
}
}
}
{
char * string = GETENV("GC_FORCE_UNMAP_ON_GCOLLECT");
if (string != NULL) {
if (*string == '0' && *(string + 1) == '\0') {
/* "0" is used to turn off the mode. */
GC_force_unmap_on_gcollect = FALSE;
} else {
GC_force_unmap_on_gcollect = TRUE;
}
}
}
{
char * string = GETENV("GC_USE_ENTIRE_HEAP");
if (string != NULL) {
if (*string == '0' && *(string + 1) == '\0') {
/* "0" is used to turn off the mode. */
GC_use_entire_heap = FALSE;
} else {
GC_use_entire_heap = TRUE;
}
}
}
# endif
# if !defined(NO_DEBUGGING) && !defined(NO_CLOCK)
GET_TIME(GC_init_time);
# endif
maybe_install_looping_handler();
# if ALIGNMENT > GC_DS_TAGS
/* Adjust normal object descriptor for extra allocation. */
if (EXTRA_BYTES != 0)
GC_obj_kinds[NORMAL].ok_descriptor = (word)(-ALIGNMENT) | GC_DS_LENGTH;
# endif
GC_exclude_static_roots_inner(beginGC_arrays, endGC_arrays);
GC_exclude_static_roots_inner(beginGC_obj_kinds, endGC_obj_kinds);
# ifdef SEPARATE_GLOBALS
GC_exclude_static_roots_inner(beginGC_objfreelist, endGC_objfreelist);
GC_exclude_static_roots_inner(beginGC_aobjfreelist, endGC_aobjfreelist);
# endif
# if defined(USE_PROC_FOR_LIBRARIES) && defined(GC_LINUX_THREADS)
WARN("USE_PROC_FOR_LIBRARIES + GC_LINUX_THREADS performs poorly.\n", 0);
/* If thread stacks are cached, they tend to be scanned in */
/* entirety as part of the root set. This wil grow them to */
/* maximum size, and is generally not desirable. */
# endif
# if defined(SEARCH_FOR_DATA_START)
GC_init_linux_data_start();
# endif
# if defined(NETBSD) && defined(__ELF__)
GC_init_netbsd_elf();
# endif
# if !defined(THREADS) || defined(GC_PTHREADS) \
|| defined(NN_PLATFORM_CTR) || defined(NINTENDO_SWITCH) \
|| defined(GC_WIN32_THREADS) || defined(GC_SOLARIS_THREADS)
if (GC_stackbottom == 0) {
GC_stackbottom = GC_get_main_stack_base();
# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
GC_register_stackbottom = GC_get_register_stack_base();
# endif
} else {
# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
if (GC_register_stackbottom == 0) {
WARN("GC_register_stackbottom should be set with GC_stackbottom\n", 0);
/* The following may fail, since we may rely on */
/* alignment properties that may not hold with a user set */
/* GC_stackbottom. */
GC_register_stackbottom = GC_get_register_stack_base();
}
# endif
}
# endif
# if !defined(CPPCHECK)
GC_STATIC_ASSERT(sizeof(ptr_t) == sizeof(word));
GC_STATIC_ASSERT(sizeof(signed_word) == sizeof(word));
# if !defined(_AUX_SOURCE) || defined(__GNUC__)
GC_STATIC_ASSERT((word)(-1) > (word)0);
/* word should be unsigned */
# endif
/* We no longer check for ((void*)(-1) > NULL) since all pointers */
/* are explicitly cast to word in every less/greater comparison. */
GC_STATIC_ASSERT((signed_word)(-1) < (signed_word)0);
# endif
GC_STATIC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
# ifndef THREADS
GC_ASSERT(!((word)GC_stackbottom HOTTER_THAN (word)GC_approx_sp()));
# endif
# ifndef GC_DISABLE_INCREMENTAL
if (GC_incremental || 0 != GETENV("GC_ENABLE_INCREMENTAL")) {
# if defined(CHECKSUMS) || defined(SMALL_CONFIG)
/* TODO: Implement CHECKSUMS for manual VDB. */
# else
if (manual_vdb_allowed) {
GC_manual_vdb = TRUE;
GC_incremental = TRUE;
} else
# endif
/* else */ {
/* For GWW_VDB on Win32, this needs to happen before any */
/* heap memory is allocated. */
GC_incremental = GC_dirty_init();
GC_ASSERT(GC_bytes_allocd == 0);
}
}
# endif
/* Add initial guess of root sets. Do this first, since sbrk(0) */
/* might be used. */
if (GC_REGISTER_MAIN_STATIC_DATA()) GC_register_data_segments();
GC_init_headers();
GC_bl_init();
GC_mark_init();
{
char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
if (sz_str != NULL) {
initial_heap_sz = GC_parse_mem_size_arg(sz_str);
if (initial_heap_sz <= MINHINCR * HBLKSIZE) {
WARN("Bad initial heap size %s - ignoring it.\n", sz_str);
}
}
}
{
char * sz_str = GETENV("GC_MAXIMUM_HEAP_SIZE");
if (sz_str != NULL) {
word max_heap_sz = GC_parse_mem_size_arg(sz_str);
if (max_heap_sz < initial_heap_sz) {
WARN("Bad maximum heap size %s - ignoring it.\n", sz_str);
}
if (0 == GC_max_retries) GC_max_retries = 2;
GC_set_max_heap_size(max_heap_sz);
}
}
if (!GC_expand_hp_inner(divHBLKSZ(initial_heap_sz))) {
GC_err_printf("Can't start up: not enough memory\n");
EXIT();
} else {
GC_requested_heapsize += initial_heap_sz;
}
if (GC_all_interior_pointers)
GC_initialize_offsets();
GC_register_displacement_inner(0L);
# if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
if (!GC_all_interior_pointers) {
/* TLS ABI uses pointer-sized offsets for dtv. */
GC_register_displacement_inner(sizeof(void *));
}
# endif
GC_init_size_map();
# ifdef PCR
if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
!= PCR_ERes_okay) {
ABORT("Can't lock load state");
} else if (PCR_IL_Unlock() != PCR_ERes_okay) {
ABORT("Can't unlock load state");
}
PCR_IL_Unlock();
GC_pcr_install();
# endif
GC_is_initialized = TRUE;
# if defined(GC_ASSERTIONS) && defined(GC_ALWAYS_MULTITHREADED)
LOCK(); /* just to set GC_lock_holder */
# endif
# if defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
GC_thr_init();
# ifdef PARALLEL_MARK
/* Actually start helper threads. */
# if defined(GC_ASSERTIONS) && defined(GC_ALWAYS_MULTITHREADED)
UNLOCK();
# endif
GC_start_mark_threads_inner();
# if defined(GC_ASSERTIONS) && defined(GC_ALWAYS_MULTITHREADED)
LOCK();
# endif
# endif
# endif
COND_DUMP;
/* Get black list set up and/or incremental GC started */
if (!GC_dont_precollect || GC_incremental) {
GC_gcollect_inner();
}
# if defined(GC_ASSERTIONS) && defined(GC_ALWAYS_MULTITHREADED)
UNLOCK();
# endif
# if defined(THREADS) && defined(UNIX_LIKE) && !defined(NO_GETCONTEXT)
/* Ensure getcontext_works is set to avoid potential data race. */
if (GC_dont_gc || GC_dont_precollect)
GC_with_callee_saves_pushed(callee_saves_pushed_dummy_fn, NULL);
# endif
# ifndef DONT_USE_ATEXIT
if (GC_find_leak) {
/* This is to give us at least one chance to detect leaks. */
/* This may report some very benign leaks, but ... */
atexit(GC_exit_check);
}
# endif
/* The rest of this again assumes we don't really hold */
/* the allocation lock. */
# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC) \
|| (defined(GC_ALWAYS_MULTITHREADED) && defined(GC_WIN32_THREADS) \
&& !defined(GC_NO_THREADS_DISCOVERY))
/* Make sure marker threads are started and thread local */
/* allocation is initialized, in case we didn't get */
/* called from GC_init_parallel. */
GC_init_parallel();
# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
# if defined(DYNAMIC_LOADING) && defined(DARWIN)
/* This must be called WITHOUT the allocation lock held */
/* and before any threads are created. */
GC_init_dyld();
# endif
RESTORE_CANCEL(cancel_state);
}
GC_API void GC_CALL GC_enable_incremental(void)
{
# if !defined(GC_DISABLE_INCREMENTAL) && !defined(KEEP_BACK_PTRS)
DCL_LOCK_STATE;
/* If we are keeping back pointers, the GC itself dirties all */
/* pages on which objects have been marked, making */
/* incremental GC pointless. */
if (!GC_find_leak && 0 == GETENV("GC_DISABLE_INCREMENTAL")) {
LOCK();
if (!GC_incremental) {
GC_setpagesize();
/* if (GC_no_win32_dlls) goto out; Should be win32S test? */
maybe_install_looping_handler(); /* Before write fault handler! */
if (!GC_is_initialized) {
UNLOCK();
GC_incremental = TRUE; /* indicate intention to turn it on */
GC_init();
LOCK();
} else {
# if !defined(CHECKSUMS) && !defined(SMALL_CONFIG)
if (manual_vdb_allowed) {
GC_manual_vdb = TRUE;
GC_incremental = TRUE;
} else
# endif
/* else */ {
GC_incremental = GC_dirty_init();
}
}
if (GC_incremental && !GC_dont_gc) {
/* Can't easily do it if GC_dont_gc. */
IF_CANCEL(int cancel_state;)
DISABLE_CANCEL(cancel_state);
if (GC_bytes_allocd > 0) {
/* There may be unmarked reachable objects. */
GC_gcollect_inner();
}
/* else we're OK in assuming everything's */
/* clean since nothing can point to an */
/* unmarked object. */
GC_read_dirty(FALSE);
RESTORE_CANCEL(cancel_state);
}
}
UNLOCK();
return;
}
# endif
GC_init();
}
#if defined(THREADS)
GC_API void GC_CALL GC_start_mark_threads(void)
{
# if defined(PARALLEL_MARK) && defined(CAN_HANDLE_FORK) \
&& !defined(THREAD_SANITIZER)
/* TSan does not support threads creation in the child process. */
IF_CANCEL(int cancel_state;)
DISABLE_CANCEL(cancel_state);
GC_start_mark_threads_inner();
RESTORE_CANCEL(cancel_state);
# else
/* No action since parallel markers are disabled (or no POSIX fork). */
GC_ASSERT(I_DONT_HOLD_LOCK());
# endif
}
#endif
GC_API void GC_CALL GC_deinit(void)
{
if (GC_is_initialized) {
/* Prevent duplicate resource close. */
GC_is_initialized = FALSE;
# if defined(THREADS) && (defined(MSWIN32) || defined(MSWINCE))
DeleteCriticalSection(&GC_write_cs);
DeleteCriticalSection(&GC_allocate_ml);
# endif
}
}
#if defined(MSWIN32) || defined(MSWINCE)
# if defined(_MSC_VER) && defined(_DEBUG) && !defined(MSWINCE)
# include <crtdbg.h>
# endif
STATIC HANDLE GC_log = 0;
# ifdef THREADS
# if defined(PARALLEL_MARK) && !defined(GC_ALWAYS_MULTITHREADED)
# define IF_NEED_TO_LOCK(x) if (GC_parallel || GC_need_to_lock) x
# else
# define IF_NEED_TO_LOCK(x) if (GC_need_to_lock) x
# endif
# else
# define IF_NEED_TO_LOCK(x)
# endif /* !THREADS */
# ifdef MSWINRT_FLAVOR
# include <windows.storage.h>
/* This API is defined in roapi.h, but we cannot include it here */
/* since it does not compile in C. */
DECLSPEC_IMPORT HRESULT WINAPI RoGetActivationFactory(
HSTRING activatableClassId,
REFIID iid, void** factory);
static GC_bool getWinRTLogPath(wchar_t* buf, size_t bufLen)
{
static const GUID kIID_IApplicationDataStatics = {
0x5612147B, 0xE843, 0x45E3,
0x94, 0xD8, 0x06, 0x16, 0x9E, 0x3C, 0x8E, 0x17
};
static const GUID kIID_IStorageItem = {
0x4207A996, 0xCA2F, 0x42F7,
0xBD, 0xE8, 0x8B, 0x10, 0x45, 0x7A, 0x7F, 0x30
};
GC_bool result = FALSE;
HSTRING_HEADER appDataClassNameHeader;
HSTRING appDataClassName;
__x_ABI_CWindows_CStorage_CIApplicationDataStatics* appDataStatics = 0;
GC_ASSERT(bufLen > 0);
if (SUCCEEDED(WindowsCreateStringReference(
RuntimeClass_Windows_Storage_ApplicationData,
(sizeof(RuntimeClass_Windows_Storage_ApplicationData)-1)
/ sizeof(wchar_t),
&appDataClassNameHeader, &appDataClassName))
&& SUCCEEDED(RoGetActivationFactory(appDataClassName,
&kIID_IApplicationDataStatics,
&appDataStatics))) {
__x_ABI_CWindows_CStorage_CIApplicationData* appData = NULL;
__x_ABI_CWindows_CStorage_CIStorageFolder* tempFolder = NULL;
__x_ABI_CWindows_CStorage_CIStorageItem* tempFolderItem = NULL;
HSTRING tempPath = NULL;
if (SUCCEEDED(appDataStatics->lpVtbl->get_Current(appDataStatics,
&appData))
&& SUCCEEDED(appData->lpVtbl->get_TemporaryFolder(appData,
&tempFolder))
&& SUCCEEDED(tempFolder->lpVtbl->QueryInterface(tempFolder,
&kIID_IStorageItem,
&tempFolderItem))
&& SUCCEEDED(tempFolderItem->lpVtbl->get_Path(tempFolderItem,
&tempPath))) {
UINT32 tempPathLen;
const wchar_t* tempPathBuf =
WindowsGetStringRawBuffer(tempPath, &tempPathLen);
buf[0] = '\0';
if (wcsncat_s(buf, bufLen, tempPathBuf, tempPathLen) == 0
&& wcscat_s(buf, bufLen, L"\\") == 0
&& wcscat_s(buf, bufLen, TEXT(GC_LOG_STD_NAME)) == 0)
result = TRUE;
WindowsDeleteString(tempPath);
}
if (tempFolderItem != NULL)
tempFolderItem->lpVtbl->Release(tempFolderItem);
if (tempFolder != NULL)
tempFolder->lpVtbl->Release(tempFolder);
if (appData != NULL)
appData->lpVtbl->Release(appData);
appDataStatics->lpVtbl->Release(appDataStatics);
}
return result;
}
# endif /* MSWINRT_FLAVOR */
STATIC HANDLE GC_CreateLogFile(void)
{
HANDLE hFile;
# ifdef MSWINRT_FLAVOR
TCHAR pathBuf[_MAX_PATH + 0x10]; /* buffer for path + ext */
hFile = INVALID_HANDLE_VALUE;
if (getWinRTLogPath(pathBuf, _MAX_PATH + 1)) {
CREATEFILE2_EXTENDED_PARAMETERS extParams;
BZERO(&extParams, sizeof(extParams));
extParams.dwSize = sizeof(extParams);
extParams.dwFileAttributes = FILE_ATTRIBUTE_NORMAL;
extParams.dwFileFlags = GC_print_stats == VERBOSE ? 0
: FILE_FLAG_WRITE_THROUGH;
hFile = CreateFile2(pathBuf, GENERIC_WRITE, FILE_SHARE_READ,
CREATE_ALWAYS, &extParams);
}
# else
TCHAR *logPath;
BOOL appendToFile = FALSE;
# if !defined(NO_GETENV_WIN32) || !defined(OLD_WIN32_LOG_FILE)
TCHAR pathBuf[_MAX_PATH + 0x10]; /* buffer for path + ext */
logPath = pathBuf;
# endif
/* Use GetEnvironmentVariable instead of GETENV() for unicode support. */
# ifndef NO_GETENV_WIN32
if (GetEnvironmentVariable(TEXT("GC_LOG_FILE"), pathBuf,
_MAX_PATH + 1) - 1U < (DWORD)_MAX_PATH) {
appendToFile = TRUE;
} else
# endif
/* else */ {
/* Env var not found or its value too long. */
# ifdef OLD_WIN32_LOG_FILE
logPath = TEXT(GC_LOG_STD_NAME);
# else
int len = (int)GetModuleFileName(NULL /* hModule */, pathBuf,
_MAX_PATH + 1);
/* If GetModuleFileName() has failed then len is 0. */
if (len > 4 && pathBuf[len - 4] == (TCHAR)'.') {
len -= 4; /* strip executable file extension */
}
BCOPY(TEXT(".") TEXT(GC_LOG_STD_NAME), &pathBuf[len],
sizeof(TEXT(".") TEXT(GC_LOG_STD_NAME)));
# endif
}
hFile = CreateFile(logPath, GENERIC_WRITE, FILE_SHARE_READ,
NULL /* lpSecurityAttributes */,
appendToFile ? OPEN_ALWAYS : CREATE_ALWAYS,
GC_print_stats == VERBOSE ? FILE_ATTRIBUTE_NORMAL :
/* immediately flush writes unless very verbose */
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_WRITE_THROUGH,
NULL /* hTemplateFile */);
# ifndef NO_GETENV_WIN32
if (appendToFile && hFile != INVALID_HANDLE_VALUE) {
LONG posHigh = 0;
(void)SetFilePointer(hFile, 0, &posHigh, FILE_END);
/* Seek to file end (ignoring any error) */
}
# endif
# endif
return hFile;
}
STATIC int GC_write(const char *buf, size_t len)
{
BOOL res;
DWORD written;
# if defined(THREADS) && defined(GC_ASSERTIONS)
static GC_bool inside_write = FALSE;
/* to prevent infinite recursion at abort. */
if (inside_write)
return -1;
# endif
if (len == 0)
return 0;
IF_NEED_TO_LOCK(EnterCriticalSection(&GC_write_cs));
# if defined(THREADS) && defined(GC_ASSERTIONS)
if (GC_write_disabled) {
inside_write = TRUE;
ABORT("Assertion failure: GC_write called with write_disabled");
}
# endif
if (GC_log == 0) {
GC_log = GC_CreateLogFile();
}
if (GC_log == INVALID_HANDLE_VALUE) {
IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
# ifdef NO_DEBUGGING
/* Ignore open log failure (e.g., it might be caused by */
/* read-only folder of the client application). */
return 0;
# else
return -1;
# endif
}
res = WriteFile(GC_log, buf, (DWORD)len, &written, NULL);
# if defined(_MSC_VER) && defined(_DEBUG)
# ifdef MSWINCE
/* There is no CrtDbgReport() in WinCE */
{
WCHAR wbuf[1024];
/* Always use Unicode variant of OutputDebugString() */
wbuf[MultiByteToWideChar(CP_ACP, 0 /* dwFlags */,
buf, len, wbuf,
sizeof(wbuf) / sizeof(wbuf[0]) - 1)] = 0;
OutputDebugStringW(wbuf);
}
# else
_CrtDbgReport(_CRT_WARN, NULL, 0, NULL, "%.*s", len, buf);
# endif
# endif
IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
return res ? (int)written : -1;
}
/* TODO: This is pretty ugly ... */
# define WRITE(f, buf, len) GC_write(buf, len)
#elif defined(OS2) || defined(MACOS)
STATIC FILE * GC_stdout = NULL;
STATIC FILE * GC_stderr = NULL;
STATIC FILE * GC_log = NULL;
/* Initialize GC_log (and the friends) passed to GC_write(). */
STATIC void GC_set_files(void)
{
if (GC_stdout == NULL) {
GC_stdout = stdout;
}
if (GC_stderr == NULL) {
GC_stderr = stderr;
}
if (GC_log == NULL) {
GC_log = stderr;
}
}
GC_INLINE int GC_write(FILE *f, const char *buf, size_t len)
{
int res = fwrite(buf, 1, len, f);
fflush(f);
return res;
}
# define WRITE(f, buf, len) (GC_set_files(), GC_write(f, buf, len))
#elif defined(GC_ANDROID_LOG)
# include <android/log.h>
# ifndef GC_ANDROID_LOG_TAG
# define GC_ANDROID_LOG_TAG "BDWGC"
# endif
# define GC_stdout ANDROID_LOG_DEBUG
# define GC_stderr ANDROID_LOG_ERROR
# define GC_log GC_stdout
# define WRITE(level, buf, unused_len) \
__android_log_write(level, GC_ANDROID_LOG_TAG, buf)
# elif defined(NN_PLATFORM_CTR)
int n3ds_log_write(const char* text, int length);
# define WRITE(level, buf, len) n3ds_log_write(buf, len)
# elif defined(NINTENDO_SWITCH)
int switch_log_write(const char* text, int length);
# define WRITE(level, buf, len) switch_log_write(buf, len)
#else
# if !defined(AMIGA) && !defined(MSWIN_XBOX1) && !defined(SN_TARGET_ORBIS) \
&& !defined(SN_TARGET_PSP2) && !defined(__CC_ARM)
# include <unistd.h>
# endif
STATIC int GC_write(int fd, const char *buf, size_t len)
{
# if defined(ECOS) || defined(SN_TARGET_ORBIS) || defined(SN_TARGET_PSP2) \
|| defined(NOSYS)
# ifdef ECOS
/* FIXME: This seems to be defined nowhere at present. */
/* _Jv_diag_write(buf, len); */
# else
/* No writing. */
# endif
return len;
# else
int bytes_written = 0;
IF_CANCEL(int cancel_state;)
DISABLE_CANCEL(cancel_state);
while ((size_t)bytes_written < len) {
# ifdef GC_SOLARIS_THREADS
int result = syscall(SYS_write, fd, buf + bytes_written,
len - bytes_written);
# else
int result = write(fd, buf + bytes_written, len - bytes_written);
# endif
if (-1 == result) {
RESTORE_CANCEL(cancel_state);
return(result);
}
bytes_written += result;
}
RESTORE_CANCEL(cancel_state);
return(bytes_written);
# endif
}
# define WRITE(f, buf, len) GC_write(f, buf, len)
#endif /* !MSWIN32 && !OS2 && !MACOS && !GC_ANDROID_LOG */
#define BUFSZ 1024
#if defined(DJGPP) || defined(__STRICT_ANSI__)
/* vsnprintf is missing in DJGPP (v2.0.3) */
# define GC_VSNPRINTF(buf, bufsz, format, args) vsprintf(buf, format, args)
#elif defined(_MSC_VER)
# ifdef MSWINCE
/* _vsnprintf is deprecated in WinCE */
# define GC_VSNPRINTF StringCchVPrintfA
# else
# define GC_VSNPRINTF _vsnprintf
# endif
#else
# define GC_VSNPRINTF vsnprintf
#endif
/* A version of printf that is unlikely to call malloc, and is thus safer */
/* to call from the collector in case malloc has been bound to GC_malloc. */
/* Floating point arguments and formats should be avoided, since FP */
/* conversion is more likely to allocate memory. */
/* Assumes that no more than BUFSZ-1 characters are written at once. */
#define GC_PRINTF_FILLBUF(buf, format) \
do { \
va_list args; \
va_start(args, format); \
(buf)[sizeof(buf) - 1] = 0x15; /* guard */ \
(void)GC_VSNPRINTF(buf, sizeof(buf) - 1, format, args); \
va_end(args); \
if ((buf)[sizeof(buf) - 1] != 0x15) \
ABORT("GC_printf clobbered stack"); \
} while (0)
void GC_printf(const char *format, ...)
{
if (!GC_quiet) {
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
# ifdef NACL
(void)WRITE(GC_stdout, buf, strlen(buf));
/* Ignore errors silently. */
# else
if (WRITE(GC_stdout, buf, strlen(buf)) < 0)
ABORT("write to stdout failed");
# endif
}
}
void GC_err_printf(const char *format, ...)
{
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
GC_err_puts(buf);
}
void GC_log_printf(const char *format, ...)
{
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
# ifdef NACL
(void)WRITE(GC_log, buf, strlen(buf));
# else
if (WRITE(GC_log, buf, strlen(buf)) < 0)
ABORT("write to GC log failed");
# endif
}
#ifndef GC_ANDROID_LOG
# define GC_warn_printf GC_err_printf
#else
GC_INNER void GC_info_log_printf(const char *format, ...)
{
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
(void)WRITE(ANDROID_LOG_INFO, buf, 0 /* unused */);
}
GC_INNER void GC_verbose_log_printf(const char *format, ...)
{
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
(void)WRITE(ANDROID_LOG_VERBOSE, buf, 0); /* ignore write errors */
}
STATIC void GC_warn_printf(const char *format, ...)
{
char buf[BUFSZ + 1];
GC_PRINTF_FILLBUF(buf, format);
(void)WRITE(ANDROID_LOG_WARN, buf, 0);
}
#endif /* GC_ANDROID_LOG */
void GC_err_puts(const char *s)
{
(void)WRITE(GC_stderr, s, strlen(s)); /* ignore errors */
}
STATIC void GC_CALLBACK GC_default_warn_proc(char *msg, GC_word arg)
{
/* TODO: Add assertion on arg comply with msg (format). */
GC_warn_printf(msg, arg);
}
GC_INNER GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
/* This is recommended for production code (release). */
GC_API void GC_CALLBACK GC_ignore_warn_proc(char *msg, GC_word arg)
{
if (GC_print_stats) {
/* Don't ignore warnings if stats printing is on. */
GC_default_warn_proc(msg, arg);
}
}
GC_API void GC_CALL GC_set_warn_proc(GC_warn_proc p)
{
DCL_LOCK_STATE;
GC_ASSERT(NONNULL_ARG_NOT_NULL(p));
# ifdef GC_WIN32_THREADS
# ifdef CYGWIN32
/* Need explicit GC_INIT call */
GC_ASSERT(GC_is_initialized);
# else
if (!GC_is_initialized) GC_init();
# endif
# endif
LOCK();
GC_current_warn_proc = p;
UNLOCK();
}
GC_API GC_warn_proc GC_CALL GC_get_warn_proc(void)
{
GC_warn_proc result;
DCL_LOCK_STATE;
LOCK();
result = GC_current_warn_proc;
UNLOCK();
return(result);
}
#if !defined(PCR) && !defined(SMALL_CONFIG)
/* Print (or display) a message before abnormal exit (including */
/* abort). Invoked from ABORT(msg) macro (there msg is non-NULL) */
/* and from EXIT() macro (msg is NULL in that case). */
STATIC void GC_CALLBACK GC_default_on_abort(const char *msg)
{
# ifndef DONT_USE_ATEXIT
skip_gc_atexit = TRUE; /* disable at-exit GC_gcollect() */
# endif
if (msg != NULL) {
# if defined(MSWIN32) && !defined(MSWINRT_FLAVOR) && !defined(MSWIN_XBOX1)
GC_win32_MessageBoxA(msg, "Fatal error in GC", MB_ICONERROR | MB_OK);
/* Also duplicate msg to GC log file. */
# endif
# ifndef GC_ANDROID_LOG
/* Avoid calling GC_err_printf() here, as GC_on_abort() could be */
/* called from it. Note 1: this is not an atomic output. */
/* Note 2: possible write errors are ignored. */
# if defined(THREADS) && defined(GC_ASSERTIONS) \
&& (defined(MSWIN32) || defined(MSWINCE))
if (!GC_write_disabled)
# endif
{
if (WRITE(GC_stderr, msg, strlen(msg)) >= 0)
(void)WRITE(GC_stderr, "\n", 1);
}
# else
__android_log_assert("*" /* cond */, GC_ANDROID_LOG_TAG, "%s\n", msg);
# endif
}
# if !defined(NO_DEBUGGING) && !defined(GC_ANDROID_LOG)
if (GETENV("GC_LOOP_ON_ABORT") != NULL) {
/* In many cases it's easier to debug a running process. */
/* It's arguably nicer to sleep, but that makes it harder */
/* to look at the thread if the debugger doesn't know much */
/* about threads. */
for(;;) {
/* Empty */
}
}
# endif
}
GC_abort_func GC_on_abort = GC_default_on_abort;
GC_API void GC_CALL GC_set_abort_func(GC_abort_func fn)
{
DCL_LOCK_STATE;
GC_ASSERT(NONNULL_ARG_NOT_NULL(fn));
LOCK();
GC_on_abort = fn;
UNLOCK();
}
GC_API GC_abort_func GC_CALL GC_get_abort_func(void)
{
GC_abort_func fn;
DCL_LOCK_STATE;
LOCK();
fn = GC_on_abort;
UNLOCK();
return fn;
}
#endif /* !SMALL_CONFIG */
GC_API void GC_CALL GC_enable(void)
{
DCL_LOCK_STATE;
LOCK();
GC_ASSERT(GC_dont_gc != 0); /* ensure no counter underflow */
GC_dont_gc--;
UNLOCK();
}
GC_API void GC_CALL GC_disable(void)
{
DCL_LOCK_STATE;
LOCK();
GC_dont_gc++;
UNLOCK();
}
GC_API int GC_CALL GC_is_disabled(void)
{
return GC_dont_gc != 0;
}
/* Helper procedures for new kind creation. */
GC_API void ** GC_CALL GC_new_free_list_inner(void)
{
void *result;
GC_ASSERT(I_HOLD_LOCK());
result = GC_INTERNAL_MALLOC((MAXOBJGRANULES+1) * sizeof(ptr_t), PTRFREE);
if (NULL == result) ABORT("Failed to allocate freelist for new kind");
BZERO(result, (MAXOBJGRANULES+1)*sizeof(ptr_t));
return (void **)result;
}
GC_API void ** GC_CALL GC_new_free_list(void)
{
void ** result;
DCL_LOCK_STATE;
LOCK();
result = GC_new_free_list_inner();
UNLOCK();
return result;
}
GC_API unsigned GC_CALL GC_new_kind_inner(void **fl, GC_word descr,
int adjust, int clear)
{
unsigned result = GC_n_kinds;
GC_ASSERT(adjust == FALSE || adjust == TRUE);
/* If an object is not needed to be cleared (when moved to the */
/* free list) then its descriptor should be zero to denote */
/* a pointer-free object (and, as a consequence, the size of the */
/* object should not be added to the descriptor template). */
GC_ASSERT(clear == TRUE
|| (descr == 0 && adjust == FALSE && clear == FALSE));
if (result < MAXOBJKINDS) {
GC_n_kinds++;
GC_obj_kinds[result].ok_freelist = fl;
GC_obj_kinds[result].ok_reclaim_list = 0;
GC_obj_kinds[result].ok_descriptor = descr;
GC_obj_kinds[result].ok_relocate_descr = adjust;
GC_obj_kinds[result].ok_init = (GC_bool)clear;
# ifdef ENABLE_DISCLAIM
GC_obj_kinds[result].ok_mark_unconditionally = FALSE;
GC_obj_kinds[result].ok_disclaim_proc = 0;
# endif
} else {
ABORT("Too many kinds");
}
return result;
}
GC_API unsigned GC_CALL GC_new_kind(void **fl, GC_word descr, int adjust,
int clear)
{
unsigned result;
DCL_LOCK_STATE;
LOCK();
result = GC_new_kind_inner(fl, descr, adjust, clear);
UNLOCK();
return result;
}
GC_API unsigned GC_CALL GC_new_proc_inner(GC_mark_proc proc)
{
unsigned result = GC_n_mark_procs;
if (result < MAX_MARK_PROCS) {
GC_n_mark_procs++;
GC_mark_procs[result] = proc;
} else {
ABORT("Too many mark procedures");
}
return result;
}
GC_API unsigned GC_CALL GC_new_proc(GC_mark_proc proc)
{
unsigned result;
DCL_LOCK_STATE;
LOCK();
result = GC_new_proc_inner(proc);
UNLOCK();
return result;
}
GC_API void * GC_CALL GC_call_with_alloc_lock(GC_fn_type fn, void *client_data)
{
void * result;
DCL_LOCK_STATE;
# ifdef THREADS
LOCK();
# endif
result = (*fn)(client_data);
# ifdef THREADS
UNLOCK();
# endif
return(result);
}
GC_API void * GC_CALL GC_call_with_stack_base(GC_stack_base_func fn, void *arg)
{
struct GC_stack_base base;
void *result;
base.mem_base = (void *)&base;
# ifdef IA64
base.reg_base = (void *)GC_save_regs_in_stack();
/* Unnecessarily flushes register stack, */
/* but that probably doesn't hurt. */
# endif
result = fn(&base, arg);
/* Strongly discourage the compiler from treating the above */
/* as a tail call. */
GC_noop1((word)(&base));
return result;
}
#ifndef THREADS
GC_INNER ptr_t GC_blocked_sp = NULL;
/* NULL value means we are not inside GC_do_blocking() call. */
# ifdef IA64
STATIC ptr_t GC_blocked_register_sp = NULL;
# endif
GC_INNER struct GC_traced_stack_sect_s *GC_traced_stack_sect = NULL;
/* This is nearly the same as in win32_threads.c */
GC_API void * GC_CALL GC_call_with_gc_active(GC_fn_type fn,
void * client_data)
{
struct GC_traced_stack_sect_s stacksect;
GC_ASSERT(GC_is_initialized);
/* Adjust our stack base value (this could happen if */
/* GC_get_main_stack_base() is unimplemented or broken for */
/* the platform). */
if ((word)GC_stackbottom HOTTER_THAN (word)(&stacksect))
GC_stackbottom = (ptr_t)(&stacksect);
if (GC_blocked_sp == NULL) {
/* We are not inside GC_do_blocking() - do nothing more. */
client_data = fn(client_data);
/* Prevent treating the above as a tail call. */
GC_noop1((word)(&stacksect));
return client_data; /* result */
}
/* Setup new "stack section". */
stacksect.saved_stack_ptr = GC_blocked_sp;
# ifdef IA64
/* This is the same as in GC_call_with_stack_base(). */
stacksect.backing_store_end = GC_save_regs_in_stack();
/* Unnecessarily flushes register stack, */
/* but that probably doesn't hurt. */
stacksect.saved_backing_store_ptr = GC_blocked_register_sp;
# endif
stacksect.prev = GC_traced_stack_sect;
GC_blocked_sp = NULL;
GC_traced_stack_sect = &stacksect;
client_data = fn(client_data);
GC_ASSERT(GC_blocked_sp == NULL);
GC_ASSERT(GC_traced_stack_sect == &stacksect);
# if defined(CPPCHECK)
GC_noop1((word)GC_traced_stack_sect - (word)GC_blocked_sp);
# endif
/* Restore original "stack section". */
GC_traced_stack_sect = stacksect.prev;
# ifdef IA64
GC_blocked_register_sp = stacksect.saved_backing_store_ptr;
# endif
GC_blocked_sp = stacksect.saved_stack_ptr;
return client_data; /* result */
}
/* This is nearly the same as in win32_threads.c */
STATIC void GC_do_blocking_inner(ptr_t data, void * context GC_ATTR_UNUSED)
{
struct blocking_data * d = (struct blocking_data *) data;
GC_ASSERT(GC_is_initialized);
GC_ASSERT(GC_blocked_sp == NULL);
# ifdef SPARC
GC_blocked_sp = GC_save_regs_in_stack();
# else
GC_blocked_sp = (ptr_t) &d; /* save approx. sp */
# endif
# ifdef IA64
GC_blocked_register_sp = GC_save_regs_in_stack();
# endif
d -> client_data = (d -> fn)(d -> client_data);
# ifdef SPARC
GC_ASSERT(GC_blocked_sp != NULL);
# else
GC_ASSERT(GC_blocked_sp == (ptr_t)(&d));
# endif
# if defined(CPPCHECK)
GC_noop1((word)GC_blocked_sp);
# endif
GC_blocked_sp = NULL;
}
#endif /* !THREADS */
/* Wrapper for functions that are likely to block (or, at least, do not */
/* allocate garbage collected memory and/or manipulate pointers to the */
/* garbage collected heap) for an appreciable length of time. */
/* In the single threaded case, GC_do_blocking() (together */
/* with GC_call_with_gc_active()) might be used to make stack scanning */
/* more precise (i.e. scan only stack frames of functions that allocate */
/* garbage collected memory and/or manipulate pointers to the garbage */
/* collected heap). */
GC_API void * GC_CALL GC_do_blocking(GC_fn_type fn, void * client_data)
{
struct blocking_data my_data;
my_data.fn = fn;
my_data.client_data = client_data;
GC_with_callee_saves_pushed(GC_do_blocking_inner, (ptr_t)(&my_data));
return my_data.client_data; /* result */
}
#if !defined(NO_DEBUGGING)
GC_API void GC_CALL GC_dump(void)
{
DCL_LOCK_STATE;
LOCK();
GC_dump_named(NULL);
UNLOCK();
}
GC_API void GC_CALL GC_dump_named(const char *name)
{
# ifndef NO_CLOCK
CLOCK_TYPE current_time;
GET_TIME(current_time);
# endif
if (name != NULL) {
GC_printf("***GC Dump %s\n", name);
} else {
GC_printf("***GC Dump collection #%lu\n", (unsigned long)GC_gc_no);
}
# ifndef NO_CLOCK
/* Note that the time is wrapped in ~49 days if sizeof(long)==4. */
GC_printf("Time since GC init: %lu msecs\n",
MS_TIME_DIFF(current_time, GC_init_time));
# endif
GC_printf("\n***Static roots:\n");
GC_print_static_roots();
GC_printf("\n***Heap sections:\n");
GC_print_heap_sects();
GC_printf("\n***Free blocks:\n");
GC_print_hblkfreelist();
GC_printf("\n***Blocks in use:\n");
GC_print_block_list();
}
#endif /* !NO_DEBUGGING */
static void block_add_size(struct hblk *h, word pbytes)
{
hdr *hhdr = HDR(h);
*(word *)pbytes += (WORDS_TO_BYTES(hhdr->hb_sz) + (HBLKSIZE - 1))
& ~(word)(HBLKSIZE - 1);
}
GC_API size_t GC_CALL GC_get_memory_use(void)
{
word bytes = 0;
DCL_LOCK_STATE;
LOCK();
GC_apply_to_all_blocks(block_add_size, (word)(&bytes));
UNLOCK();
return (size_t)bytes;
}
/* Getter functions for the public Read-only variables. */
/* GC_get_gc_no() is unsynchronized and should be typically called */
/* inside the context of GC_call_with_alloc_lock() to prevent data */
/* races (on multiprocessors). */
GC_API GC_word GC_CALL GC_get_gc_no(void)
{
return GC_gc_no;
}
#ifdef THREADS
GC_API int GC_CALL GC_get_parallel(void)
{
/* GC_parallel is initialized at start-up. */
return GC_parallel;
}
GC_INNER GC_on_thread_event_proc GC_on_thread_event = 0;
GC_API void GC_CALL GC_set_on_thread_event(GC_on_thread_event_proc fn)
{
/* fn may be 0 (means no event notifier). */
DCL_LOCK_STATE;
LOCK();
GC_on_thread_event = fn;
UNLOCK();
}
GC_API GC_on_thread_event_proc GC_CALL GC_get_on_thread_event(void)
{
GC_on_thread_event_proc fn;
DCL_LOCK_STATE;
LOCK();
fn = GC_on_thread_event;
UNLOCK();
return fn;
}
#endif /* THREADS */
/* Setter and getter functions for the public R/W function variables. */
/* These functions are synchronized (like GC_set_warn_proc() and */
/* GC_get_warn_proc()). */
GC_API void GC_CALL GC_set_oom_fn(GC_oom_func fn)
{
GC_ASSERT(NONNULL_ARG_NOT_NULL(fn));
DCL_LOCK_STATE;
LOCK();
GC_oom_fn = fn;
UNLOCK();
}
GC_API GC_oom_func GC_CALL GC_get_oom_fn(void)
{
GC_oom_func fn;
DCL_LOCK_STATE;
LOCK();
fn = GC_oom_fn;
UNLOCK();
return fn;
}
GC_API void GC_CALL GC_set_on_heap_resize(GC_on_heap_resize_proc fn)
{
/* fn may be 0 (means no event notifier). */
DCL_LOCK_STATE;
LOCK();
GC_on_heap_resize = fn;
UNLOCK();
}
GC_API GC_on_heap_resize_proc GC_CALL GC_get_on_heap_resize(void)
{
GC_on_heap_resize_proc fn;
DCL_LOCK_STATE;
LOCK();
fn = GC_on_heap_resize;
UNLOCK();
return fn;
}
GC_API void GC_CALL GC_set_finalizer_notifier(GC_finalizer_notifier_proc fn)
{
/* fn may be 0 (means no finalizer notifier). */
DCL_LOCK_STATE;
LOCK();
GC_finalizer_notifier = fn;
UNLOCK();
}
GC_API GC_finalizer_notifier_proc GC_CALL GC_get_finalizer_notifier(void)
{
GC_finalizer_notifier_proc fn;
DCL_LOCK_STATE;
LOCK();
fn = GC_finalizer_notifier;
UNLOCK();
return fn;
}
/* Setter and getter functions for the public numeric R/W variables. */
/* It is safe to call these functions even before GC_INIT(). */
/* These functions are unsynchronized and should be typically called */
/* inside the context of GC_call_with_alloc_lock() (if called after */
/* GC_INIT()) to prevent data races (unless it is guaranteed the */
/* collector is not multi-threaded at that execution point). */
GC_API void GC_CALL GC_set_find_leak(int value)
{
/* value is of boolean type. */
GC_find_leak = value;
}
GC_API int GC_CALL GC_get_find_leak(void)
{
return GC_find_leak;
}
GC_API void GC_CALL GC_set_all_interior_pointers(int value)
{
DCL_LOCK_STATE;
GC_all_interior_pointers = value ? 1 : 0;
if (GC_is_initialized) {
/* It is not recommended to change GC_all_interior_pointers value */
/* after GC is initialized but it seems GC could work correctly */
/* even after switching the mode. */
LOCK();
GC_initialize_offsets(); /* NOTE: this resets manual offsets as well */
if (!GC_all_interior_pointers)
GC_bl_init_no_interiors();
UNLOCK();
}
}
GC_API int GC_CALL GC_get_all_interior_pointers(void)
{
return GC_all_interior_pointers;
}
GC_API void GC_CALL GC_set_finalize_on_demand(int value)
{
GC_ASSERT(value != -1);
/* value is of boolean type. */
GC_finalize_on_demand = value;
}
GC_API int GC_CALL GC_get_finalize_on_demand(void)
{
return GC_finalize_on_demand;
}
GC_API void GC_CALL GC_set_java_finalization(int value)
{
GC_ASSERT(value != -1);
/* value is of boolean type. */
GC_java_finalization = value;
}
GC_API int GC_CALL GC_get_java_finalization(void)
{
return GC_java_finalization;
}
GC_API void GC_CALL GC_set_dont_expand(int value)
{
GC_ASSERT(value != -1);
/* value is of boolean type. */
GC_dont_expand = value;
}
GC_API int GC_CALL GC_get_dont_expand(void)
{
return GC_dont_expand;
}
GC_API void GC_CALL GC_set_no_dls(int value)
{
GC_ASSERT(value != -1);
/* value is of boolean type. */
GC_no_dls = value;
}
GC_API int GC_CALL GC_get_no_dls(void)
{
return GC_no_dls;
}
GC_API void GC_CALL GC_set_non_gc_bytes(GC_word value)
{
GC_non_gc_bytes = value;
}
GC_API GC_word GC_CALL GC_get_non_gc_bytes(void)
{
return GC_non_gc_bytes;
}
GC_API void GC_CALL GC_set_free_space_divisor(GC_word value)
{
GC_ASSERT(value > 0);
GC_free_space_divisor = value;
}
GC_API GC_word GC_CALL GC_get_free_space_divisor(void)
{
return GC_free_space_divisor;
}
GC_API void GC_CALL GC_set_max_retries(GC_word value)
{
GC_ASSERT(value != ~(word)0);
GC_max_retries = value;
}
GC_API GC_word GC_CALL GC_get_max_retries(void)
{
return GC_max_retries;
}
GC_API void GC_CALL GC_set_dont_precollect(int value)
{
GC_ASSERT(value != -1);
/* value is of boolean type. */
GC_dont_precollect = value;
}
GC_API int GC_CALL GC_get_dont_precollect(void)
{
return GC_dont_precollect;
}
GC_API void GC_CALL GC_set_full_freq(int value)
{
GC_ASSERT(value >= 0);
GC_full_freq = value;
}
GC_API int GC_CALL GC_get_full_freq(void)
{
return GC_full_freq;
}
GC_API void GC_CALL GC_set_time_limit(unsigned long value)
{
GC_ASSERT(value != (unsigned long)-1L);
GC_time_limit = value;
}
GC_API unsigned long GC_CALL GC_get_time_limit(void)
{
return GC_time_limit;
}
GC_API void GC_CALL GC_set_force_unmap_on_gcollect(int value)
{
GC_force_unmap_on_gcollect = (GC_bool)value;
}
GC_API int GC_CALL GC_get_force_unmap_on_gcollect(void)
{
return (int)GC_force_unmap_on_gcollect;
}
GC_API void GC_CALL GC_abort_on_oom(void)
{
GC_err_printf("Insufficient memory for the allocation\n");
EXIT();
}
#ifdef THREADS
GC_API void GC_CALL GC_stop_world_external(void)
{
GC_ASSERT(GC_is_initialized);
LOCK();
# ifdef THREAD_LOCAL_ALLOC
GC_ASSERT(!GC_world_stopped);
# endif
STOP_WORLD();
# ifdef THREAD_LOCAL_ALLOC
GC_world_stopped = TRUE;
# endif
}
GC_API void GC_CALL GC_start_world_external(void)
{
# ifdef THREAD_LOCAL_ALLOC
GC_ASSERT(GC_world_stopped);
GC_world_stopped = FALSE;
# else
GC_ASSERT(GC_is_initialized);
# endif
START_WORLD();
UNLOCK();
}
#endif /* THREADS */